The only force acting on a 2.0-kg body as it moves along the x axis is given by Fx = (12 ? 2.0x) N, where x is in m. The velocity of the body at x = 2.0 m is 5.5

direction?



a.

36 J



b.

39 J



c.

43 J



d.

46 J



e.

30 J

---

d

Physics & Space Science

A catapult fires an 800-kg rock with an initial velocity of 100 m/s at a 40° angle to the ground. The magnitude of the vertical impulse the catapult receives from the rock is

A.

5.1 × 10⁴ Ns.

6.1 × 10⁴ Ns.

8.0 × 10⁴ Ns.

5.0 × 10⁵ Ns.

6.0 × 10⁵ Ns.

A coil of wire containing N turns is in an external magnetic field that is perpendicular to the plane of the coil and it steadily changing. Under these circumstances, an emf ? is induced in the coil

If the rate of change of the magnetic field and the number of turns in the coil are now doubled (but nothing else changes), what will be the induced emf in the coil? A) 2? B) ?/2 C) 4? D) ?/4 E) ?

The part of the Milky Way we are most familiar with is the

A) Corona. B) Galactic Disk. C) Galactic halo. D) Galactic Bulge. E) Galactic center.

A scientific law is a concise statement that describes a(n) ______________ of nature

Fill in the blank(s) with correct word